DE2848733A1 - PLATE PRESS - Google Patents

Description

Dr.-Iny. WALTE R STRONG

PATENTANWALT '} ^r ] /> P 7 3

Moerser Strasse 140 'D-4150 Krefeld 1 «S * (02151) 28222 and 20469 El 8 53 578

Becker & van Hüllen Niederrheinische Maschinenfabrik GmbH & Co., Untergath 100, 4150 Krefeld

Plate press

The invention relates to a plate press with a press table, upper beam and possibly a middle table as well to these heating plates connected with the interposition of insulation plates. Furthermore, additional Floor heating plates can be provided.

Plate presses of the aforementioned type are in particular for the vulcanization of conveyor belts and for the production of fiberboard, chipboard or the like. used. The insulation plates have the task of controlling the flow of heat from the heating plates to the upper beam, the To insulate the press table or, if necessary, also the center table, in order, on the one hand, to prevent these parts from being thermally too strong to claim and on the other hand to use the heat essentially for the actual pressing process To have available.

The insulation panels themselves consist essentially of asbestos, glass fabric and / or poorly conductive Fillers. Synthetic resins or resin mixtures modified with rubber are usually used as binders, for example silicone and, in some cases, cement. Anyway, the isolation panels are

030021/0221

Deutsche Bank AG Krefeld 103/1525 BLZ 32070080 ■ Sparkasse Krefeld 305722 BLZ 32050000 · Postal check Essen 4055-431 BLZ 360100 «

PATENT ADVOCATE DR. STARK · MOERSEK STR. 1 <«0 · 0-4150 KREFELD · ® (02151) 28222 and 20469 · [g] 853578

2 8 A 8 7 3

regularly of such a structure that they can absorb moisture and accordingly in the Panels always have a certain amount of residual moisture.

This residual moisture and also the fact that the binder combinations with the exception of cement under pressure and heat deposit residues of phenol, cresol or formaldehyde, for example, under pressure and heat, with overcondensation occurring depending on the stress and heat exposure, both lead to the insulating plates substantially concave or convex deform and lose strength and shape retention.

It is also known, in the case of very large press tables, to place the insulating plates, which can be square or rectangular, against one another piece by piece, so that an insulating plate consists of several partial plates. Particularly in the case of such partial panels, certain differences in thickness cannot be avoided in terms of production technology. These inaccuracies in thickness lead to so-called tip girders, which are specifically subjected to higher loads and are also subjected to higher thermal loads.

Accordingly, there is on the one hand the task of preventing the uneven tensioning or deformation and even destruction of the insulation panels due to the residual moisture etc. and, moreover, to compensate for inaccuracies in thickness, especially in the case of partial panels.

This object is achieved according to the invention in that the

030021/0221

PATENT ADVERTISER DR. STARK · MOERSE * STR. 140 · D-4150 KREFtLD · «g» (02151) 28222 and 20469 · Q3 853578

Insulation plates at least on one of their two surfaces up to the edges extending groove-like Have depressions. These depressions guarantee a better under thermal stress and more uniform exhaust of the plates, because the gases can escape to the outside, so that it on the one hand, gas bubbles or gas cushions cannot form between the insulating and heating plates and moreover, the deformation of the plates is avoided. In addition, the groove-like depressions make it possible an equalization of production-related differences in thickness of the panels, in which they act as compensation zones act and absorb the material displacement.

15th

According to a further feature of the invention it is provided that the groove-like depressions are on the heating plate side. are provided on the surface of the insulation plate, i.e. in the area of greatest exposure to heat.

This also ensures a particularly favorable outflow of the gas.

Furthermore, according to the invention, the groove-like depressions should intersect in a grid-like manner on the Be arranged insulating plates. In this way, an advantageous areal division is achieved, see above that, on the one hand, the differences in thickness are balanced out extremely favorably and, moreover, a large number are formed by gassing channels. This is guaranteed particularly well if the distance between the groove-like Depressions is about 50 to 200 mm.

To prevent slipping in the embodiment in which the Isolation plate consists of several sub-plates, too

030021/0221

PATENT ADVERTISER DR. STARK · MOERSER STR 140 · D-41iO KREPtLD · f £> (02151) 28222 & 20469 · QS] 853578

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prevent, it is also provided that spacer crosses are arranged between the partial plates. The spacer cross arms can expediently be shorter than the edge length and / or thinner than the thickness of the partial plates. As a result, additional exhaust gas spaces or exhaust gas ducts and compensation zones for the differences in thickness of the partial plates are formed.

The invention is illustrated in more detail in the drawing using an exemplary embodiment. Show it:

1 shows a schematic perspective illustration of a plate press with a center table and

Fig. 2, also in a perspective representation, four side-by-side sub-panels with spacer crosses in an enlarged view. 20th

According to FIG. 1, the platen press has a press table which can be raised and lowered via a cylinder piston assembly 2 is lowerable. On the presentation table 1 is initially an insulation plate designated as a whole by 3, which consists of several sub-plates 4, arranged above the insulation plate 3 is the actual heating plate 5.

The press also has an upper beam 6, which is fixedly arranged as an abutment on the press part (not shown). On the upper beam 6, in the same way as on the press table 1, an insulation plate 3 made up of several sub-plates 4 and a heating plate 5 are provided.

030021/0221

PATENT ADVOCATE DR. STARK · MOERSt-R 3TR. 140 · D-4150 KREFELD Ig »(02151) 28222 and 20469 · Q3 853578

Finally, the plate press also has a center table 7, which is on the top and bottom with Isolation plates 3 and heating plates 5 is equipped.

The insulation plates 3 or the partial plates 4 are, as can be seen in particular from the enlarged illustration according to Fig. 2, provided on one surface with groove-like depressions 8, which the Partial plates 4 cross orthogonally in a grid-like manner and are arranged so that their openings in each case to the heating plates 5.

So that the partial plates 4 cannot slip against one another, spacer crosses 9 are also provided, which are each arranged between four partial plates 4 and keep them at an exact distance. Slipping of the partial plate 4 against one another is not possible. For the sake of a better overview, the spacer cross 9 is shown raised in FIG. Since the spacer cross arms can be made both shorter than the edge length and thinner than the thickness of the partial plates 4 , additional channels 10 are formed.

Between the press table 1 and the middle table 7 as well as the upper beam 6 and the middle table 7, further heating plates - without insulation plates 3 - can of course be provided to form several press levels. On the other hand, only a single-daylight press can be used in which only one press space is provided between the upper beam 6 and press table 1. Finally, multi-daylight presses without a central table, in which the other floors consist exclusively of heating plates, can also be used.

030021/0221

R e r s e

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Claims (8)

PATENT ADVOCATE DR. STARK · MOERSE-I «TR. 140 · D-4150 KREFCLD · ^ (02151) 28222 & 20469 · Qx] 853578 8 7 3 3 Expectations: f 1st plate press with press table, upper beam and possibly a middle table, as well as connected to this with the interposition of isolation plates Heating plates and, if necessary, additional floor heating plates, in particular for the vulcanization of conveyor belts as well as for the production of fiberboard, chipboard or the like. characterized in that the insulation plates (3) Groove-like extending to the edges on at least one of its two surfaces Have depressions (8). 2. Plate press according to claim 1, characterized in that the groove-like depressions i3) on the heating plate side are provided on the surface of the insulation plate (3). 3. Plate press according to claim 1 or 2, characterized in that the groove-like depressions {8) Are arranged grid-like crossing each other on the insulating plates (3). 4. Plate press according to claim 3, characterized in that the distance between the groove-like depressions (8) is approximately 50 mm to 200 mm. 5. Plate press, in particular according to one of claims 1 to 4, in which the insulation plates consist of partial plates, characterized in that spacer crosses (9) are arranged between the partial plates (4) . 030021/0221 ORIGINAL INSPECTED PATENTANWALT DR. STARK ■ MOERSEH STR / 140 - 3-4150 KREFFLD * g »(02151) 28222 and 20469 · fl £] 853578 2648733 6. Plate press according to claim 5, characterized in that the spacer cross arms are shorter are than the edge length of the partial plates (4). 7. Plate press according to claim 5 or 6, characterized in that the spacer cross arms are thinner than the thickness of the partial plates (4). 0300 21/0221